Bootstrap::import_library

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public static function import_library($library_name)
{
    if (!$library_name)return false;
 
    $library_name = (array)$library_name;
 
    # 反向排序，从最后一个开始导入
    $library_name = array_reverse($library_name);
 
    $config_files = array();
 
    $load_num = 0;
    foreach ($library_name as $lib)
    {
        $set = self::_add_include_path_lib($lib);
 
        if (true===$set[2])
        {
            # 已加载过
            continue;
        }
 
        $config_file = $set[1] .'config'. EXT;
 
        if (is_file($config_file))
        {
            $config_files[] = $config_file;
        }
 
        $load_num++;
 
        if (IS_DEBUG && class_exists('Core', false) && class_exists('Debug', false))Core::debug()->info('import a new library: '.Core::debug_path($lib));
    }
 
    if ($config_files)
    {
        __include_config_file(self::$config, $config_files);
    }
 
    return $load_num;
}